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    2.
    发明专利
    未知

    公开(公告)号：DD291874A5

    公开(公告)日：1991-07-11

    申请号：DD33728290

    申请日：1990-01-23

    Applicant: THOMSON CONSUMER ELECTRONICS

    Inventor： RITT PETER M ,  STORK HARRY R

    IPC: G03G5/00 ,  G03G7/00 ,  G03G13/01 ,  G03G13/08 ,  G03G13/20 ,  G03G13/22 ,  H01J9/22 ,  H01J9/227 ,  H01J29/10

    Abstract: A method of electrophotographically manufacturing a luminescent screen assembly (22) on a substrate (18) of a CRT (10) includes the steps of coating the substrate with a conductive layer (32) and overcoating the conductive layer with a photoconductive layer (34), establishing an electrostatic charge on the photoconductive layer, and exposing selected areas of the photoconductive layer to visible light to affect the charge thereon. Then, the selected areas of the photoconductive layer are developed with triboelectrically charged, dry-powdered, surface-treated screen structure materials. The improved method increases the adherence of the surface-treated materials to the photoconductive layer by contacting the surface-treated materials with a solvent to render the photoconductive layer and the materials tacky. The dried screen is fixed with a plurality of coatings of an aqueous alcohol mixture of dichromated polyvinyl alcohol or potassium silicate and then filmed, aluminized and baked to form the screen assembly.

    METHOD OF ELECTROPHOTOGRAPHICALLY MANUFACTURING A LUMINESCENT SCREEN ASSEMBLY FOR A CRT
    4.
    发明专利
    METHOD OF ELECTROPHOTOGRAPHICALLY MANUFACTURING A LUMINESCENT SCREEN ASSEMBLY FOR A CRT 未知

    公开(公告)号：CA2008073A1

    公开(公告)日：1990-07-23

    申请号：CA2008073

    申请日：1990-01-18

    Applicant: THOMSON CONSUMER ELECTRONICS

    Inventor： RITT PETER M ,  STORK HARRY R

    IPC: G03G5/00 ,  G03G7/00 ,  G03G13/01 ,  G03G13/08 ,  G03G13/20 ,  G03G13/22 ,  H01J9/22 ,  H01J9/227 ,  H01J9/20

    Abstract: A method of electrophotographically manufacturing a luminescent screen assembly on a substrate of a CRT includes the steps of coating the substrate with a conductive layer and overcoating the conductive layer with a photoconductive layer, establishing an electrostatic charge on the photoconductive layer, and exposing selected areas of the photoconductive layer to visible light to affect the charge thereon. Then, the selected areas of the photoconductive layer are developed pith triboelectrically charged, dry-powdered, surface-treated screen structure materials. The improved method increases the adherence of the surface-treated materials to the photoconductive layer by contacting the surface-treated materials pith a solvent to render the photoconductive layer and the materials tacky. The dried screen is fixed with a plurality of coatings of an aqueous alcohol mixture of dichromated polyvinyl alcohol or potassium silicate and then filmed, aluminised and baked to form the screen assembly.

    6.
    发明专利
    未知

    公开(公告)号：DD295276A5

    公开(公告)日：1991-10-24

    申请号：DD34161490

    申请日：1990-06-13

    Applicant: THOMSON CONSUMER ELECTRONICS

    Inventor： RITT PETER M ,  STORK HARRY R

    IPC: G03F5/00 ,  G03G7/00 ,  H01J9/22 ,  H01J9/227 ,  H01J29/32 ,  H01J31/20 ,  H01J29/20

    Abstract: A method of manufacturing a luminescent screen assembly (22) on a substrate (18) of a CRT faceplate includes the steps of providing a coating of a non-luminescent screen structure material (23) in a predetermined pattern on the substrate, and depositing a plurality of color-emitting screen structure materials (G,B,R) on the substrate so that they are bounded by the non-luminescent material. An electrostatically-charged dry-powdered resin is:deposited onto the color-emitting and non-luminescent screen structure materials and fused to form a substantially continuous film (46).

    METHOD OF MAKING SCREEN ASSEMBLY USING ELECTROPHOTOGRAPHIC TECHNIQUE
    7.
    发明专利
    METHOD OF MAKING SCREEN ASSEMBLY USING ELECTROPHOTOGRAPHIC TECHNIQUE 未知

    公开(公告)号：PL181191B1

    公开(公告)日：2001-06-29

    申请号：PL31893195

    申请日：1995-08-03

    Applicant: THOMSON CONSUMER ELECTRONICS

    Inventor： GOROG ISTVAN ,  RITT PETER M

    IPC: G03G15/22 ,  G03C5/00 ,  G03G13/22 ,  H01J9/22 ,  H01J9/227

    Abstract: In accordance with the present invention, a method of electrophotographically manufacturing a luminescent screen assembly on an interior surface of a faceplate panel 12 of a color CRT 10 comprises the steps of coating the interior surface of the panel with a volatilizable, organic conductive material to form an organic conductive (OC) layer 32, and overcoating the OC layer 32 with a volatilizable, photoconductive material to form an organic photoconductive (OPC) layer 34. Then, a substantially uniform voltage is established on the OPC layer 34, and selected areas of the OPC layer 34 are exposed to visible light to affect the voltage thereon, without affecting the voltage on the unexposed area of the OPC layer 34. Next, triboelectrically charged, light-absorbing screen structure material is deposited onto the unexposed area of the OPC layer 34 to form a substantially continuous matrix 23 of light-absorbing material having open areas therein. The present method is an improvement over prior methods in that the present method includes the additional steps of forming a planarizing layer 35, 135 on the OPC layer 34; overcoating the planarizing layer 35, 135 with a second coating of the volatilizable, organic conductive material to form a second OC layer 132, and then overcoating the second OC layer 132 with a second coating of the volatilizable, organic photoconductive material to form a second OPC layer 134. The phosphor materials are deposited onto a suitable charged and exposed second OPC layer 134 so that the phosphors completely overlie the openings in the matrix 23 and overlap at least a portion of the matrix adjacent to the openings.

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